CONVERSION FACTORS 



Ac = 4,047 m^ = 0.04047 ha 



ac-ft = 1,233.5 m' = 1.2335 dam^ 



C° = 5/9(P-32) 



cm = 0.3937 in. 



cm^ = 0.155 in" 



dam^ = 1 ,000 m^ = 0.8 1 07 ac-ft 



ft^ = 28.3171 X 10 V 



ha = 10,000 m- = 2.471 ac 



hm = 100 m = 328.08 ft 



hm^ = lxlO*m^ 



I.gpm = 0.0758 L/s 



in = 2.54 cm 



kg = 2.20462 lb = 1.1 X 10^ tons 



km = 0.62137 miles 



km^ = 0.3861 mi' 



L = 0.3532ft^ = 0.21997I. gal = 0.26420 U.S. gal 



L/s = 0.035 cfs= 13.193 I.gpm = 15.848 U.S. gpm 



m = 3.2808 ft 



m^ = 10.765 ft- 



m^ = 1.000L = 35.3144ft^ = 219.97I.gal= 264.2 U.S. gal 



m^/s = 35.314 cfs 



mm = 0.00328 ft 



tonne = 1 ,000 kg = 1 . 1 023 ton (short) 



U.S. gpm = 0.0631 L/s 



For Air Samples 



ppm = 100 pphm = 1000 x (Molecular Weight of substance/24.45) mg/m^ 



A4-2 



